In heterogeneous catalysis, the catalyst is in a different phase from the reactants. category: oxazolidine, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 695-53-4, name is 5,5-Dimethyloxazolidine-2,4-dione. In an article，Which mentioned a new discovery about 695-53-4
The synthesis of 3-(dimethylamino)-2,2-dimethyl(1-15N)-2H-azirine (1*) was accomplished via reaction of 1-chloro-N,N,2-trimethyl-1-propenylamine (9) and sodium (1-15N) azide (Scheme 3).The earlier reported reactions of 1 with saccharin (10, Scheme 4), phthalimide (12, Scheme 5), and 2H-1,3-benzoxazin-2,4(3H)-dione (16, Scheme 6) were repeated with 1*, and the position of the 15N-label in the products was determined by 15N-NMR spectroscopy.Whereas the postulated reaction mechanismus for 10 and 12 were confirmed by those experiments, the mechanism for the reaction of 16 had to be revised.With respect to the position of 15N in the products 17 and 18, a new mechanism is formulated in Scheme 7.Treatment of 5,5-dimethyl-1,3-oxazolidine-2,4-dione (19) with 1* led to 3,4-dihydro-2H-imidazol-2-on 20 in which only N(3) was labelled.The mechanism of a ring expansion and transannular ring contraction as shown in Scheme 8 is in agreement with this finding.
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Reference：
Oxazolidine – Wikipedia,
Oxazolidine | C3H1338NO – PubChem